ASN Wikibase Occurrence # 42398
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Date: | Thursday 29 October 1998 |
Time: | 16:00 LT |
Type: | C.B. Withun T-BIRD II |
Owner/operator: | Curtis B. Withun |
Registration: | N72145 |
MSN: | 001 |
Total airframe hrs: | 1 hours |
Engine model: | Rotax 582 |
Fatalities: | Fatalities: 1 / Occupants: 1 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | New Haven, MI -
United States of America
|
Phase: | Approach |
Nature: | Unknown |
Departure airport: | , MI (57D) |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The pilot of the homebuilt experimental airplane advised air traffic that he was doing high speed taxi testing on runway 18. Shortly after making this announcement, a witness said he saw the airplane takeoff downwind on runway 36. Witnesses near the airport said they saw the airplane at a low altitude as it was climbing onto a downwind leg. One witness said the airplane was about 100 to 200-feet above the trees when it suddenly '...dropped nose down into the trees.' The on-scene investigation revealed the pusher propeller had a blade root angle set to 43-degrees at the hub. The propeller manufacturer said the blade angle for the propeller should normally be between seven and 14-degrees at its tip. With a 43-degree angle at the blade's root, the blade's tip angle would be about 20.5-degrees, according to the manufacturer's representative. No anomalies with the engine, airframe or flight control system were observed that would prevent flight.
Probable Cause: the improper installation of the propeller by the owner/pilot- mechanic and the pilot not maintaining the airplane's airspeed while approaching the trees along the airplane's flight path. A factor in this accident was the stall encountered by the pilot.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | CHI99LA013 |
Status: | Investigation completed |
Duration: | 1 year and 10 months |
Download report: | Final report |
|
Sources:
NTSB CHI99LA013
Location
Revision history:
Date/time | Contributor | Updates |
24-Oct-2008 10:30 |
ASN archive |
Added |
21-Dec-2016 19:24 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
04-Apr-2024 14:46 |
ASN Update Bot |
Updated [Time, Operator, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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